It could be a problem with the server. Sometimes servers go down or have maintenance issues.
There's a chance that the fanfiction violated the rules of the platform. For example, if it contains inappropriate or offensive content, it will be made unavailable. Also, if the author didn't follow the proper formatting or submission guidelines, it might be removed. Another reason could be that the hosting service has changed its policies regarding fanfiction, and as a result, some stories are no longer accessible.
Perhaps the story was part of a temporary event or promotion that has ended. For instance, some fanfiction platforms offer exclusive access to certain stories for a limited time. Once that time is up, the story becomes unavailable. Or it could be that there was a glitch in the system that is incorrectly flagging the story as unavailable. You can try reporting the issue to the platform's support team if you think it's a mistake.
Technical problems on the platform can also lead to stories being unavailable for reading. This could include glitches in the system, server problems, or issues with the database that stores the stories. Sometimes, if the story contains inappropriate or offensive content, the platform may remove it to maintain a certain standard.
It's hard to say for sure. Maybe the format of your fanfiction was incorrect or there was a problem with the hosting. Another possibility is that there was a complaint about it and it was temporarily removed for investigation.
Maybe the authors haven't given permission or there could be copyright issues.
Maybe it's due to copyright issues. Sometimes the rights to distribute or show a story might be restricted.
Maybe there's a technical glitch or a rights issue. It could be that the platform hosting the story is undergoing maintenance or has some sort of problem.
Maybe there are technical glitches or server issues preventing access to the story.
Perhaps the story didn't meet certain content guidelines and was removed.
It could be that the author decided to take it down for personal reasons. Or perhaps there were technical glitches preventing its availability.
Maybe there are some copyright issues or technical glitches preventing it from being accessible.
There could be several reasons. It could be that the story was removed for violating certain rules or it's temporarily down for maintenance. Another possibility is that it's only available in specific regions and your location doesn't have access.